Serving machine



March 23, 1954 L. SHULVER ETAL 2,672,722

SERVING MACHINE Filed Oct. 18. 1949 5 Sheets-Sheet l IN VEN TORS. LoujsShulzJer a Kenneth Hflrn old i /MQ ATTORNEYS. V

March 23, 1954 L. SHULVER ET AL SERVING MACHINE 5 Sheets-Sheet 2 FiledOct. 18, 1949 INVENTO 8S1! SERVING MACHINE 5 Sheets-Sheet 3 Filed Oct.18, 1949 INVENTORY. L oajs Shulliez" a ATTURNEYS.

M r T954 L. SHULVER ET AL.

SERVING MACHINE 5 Sheets-Sheet 4 Filed Oct. 18, 1949 fizvejzl'azws:Loujs 5b ulvera Kenn el'lz fl qnnold March 1954 L. SHULVER E'EAL SERVINGMACHINE 5 Sheets-Sheet 5 Filed Oct. 18. 1949 La 0212 1 01 -2; LouisSlaulzier a Keane flli arzz e ys.

Patented Mar. 23, 1954 SERVING MACHINE Louis shuiv r, Central F Arnold,Pawtucket, R. I

Braiding Machine Co mpany, Central Falls,

ails, and Kenneth H.

assignors to Wardwell R. L, a corporation of Maine Application October18, 1949, Serial No. 121,988 4 Claims. (Cl. 5'7-15) This inventionrelates to an improved servnot be cut to replenish the strand-supplywhereby the machine will cover maximum lengths of the wire or conductorcontinuously.

Another object is to. provide a machine of the type indicated having amain head carrying a plurality of strand-supplies and rotatable in onedirection to closely wrap the strands around the supplies to insure auniformly tight wrap of the strand material around the core. t Anotherobject is to provide means for feeding the wire from a -supply reelthrough .the matherefrom to wind on another reel while traversing itlengthwise of the barrel of thelatter to insure a uniformdisposiwtion ofthe layersof winding t .Further objects of, the improvement are setforth in the following specification which describes a preferredembodiment of the invention, by way of example, as illustrated by theaccompanying drawings. In thedrawings; Fig. 1 is a front elevational,viewof themachine shown with the housings. for gears of the two headsinsection, the arrangement of the drive; t. it

Fig. 2 is a top. plan view of the, main or lower head shown as carryingeight supply caps or ing the "Fig. 3 is an enlarged side view of theconicallydisposed brackets which support the guiding and tension devicesfor the strands, with its mounting on the axial spindle shown partly insection;

Fig. 4 is an enlarged top plan view of the upper head of the machineillustrated as carrying two strand supplies for the binder wraps andpart sectiona1 to show the driving means therefor;

Fig. 515 an enlarged plan view for driving the main head;

Fig. 6 is an enlarged elevational view. of the change-gear drivingmechanism for the upper head of the machine shown with its mounting;

of wagering belt driving connections between the main, shaft of themachine and the drive for the upper head;

Fig. 8 is a part-sectional elevational view of the upperhead showing thebraking means for the packages, carried thereby; and

Fig. 9 is a view of the centrifugally-operated braking means forcontrolling the rotation of the supply packages on the main head of themachine. t V Heretofore, in machines for serving strand material ontoelongate cores it has. been. the usual practice to mount several reservepackages of yarn or similar strand material above, the serving head withthe core, such as a wire or the like, passing through the hollowcentersof the packages. The strand materialis drawn. off from onepackage arranged be1ow,.wrapped about the core by guiding means in theform of a flier and as each delivering package is exhausted the machineis stopped and another package lowered onto the head enclosing the coreso as not to out the wire. This arrangement limits the numbercf-packages that can be placed in 1y notmore than two,

given length of wire. When the reserve supply packages of yarn areexhausted it is necessary to cutthe wire and apply a new series ofpackages to the machine with the wire passed through their interiors.This greatly reduces the lengthof wire that can be covered withoutcutting it and is a serious disadvantage since it-isdesirable to servethe wire continuously in long lengths ]to avoid multiple splices in theconductor. T To overcome thi deficiency in previously-used servers thepresent invention contemplates a novel and ingenious construction of themachine whereby the strand-supply packages may be car.- ried. in groupsarranged concentrically surroundwire or other core feeding through theterial disposed circumferentially outside th core arranged in truncatedpyramidal form so that a large number of the supplies may be revolvedabout the core. For some purposes a second auxiliary head is arrangedabove the main head to revolve a, lesser number of supply packagesaround the core, two for example, to deliver their strands to the coreand wrap them around the initial serving in reverse direction to apply abinder for holding the first-served strands securely in place. two headsof the above arrangement the lower or main head is driven directly frompower means to rotate at high speed and-the upper auxiliary binder-headmay be driven therefrom at a slower rate of speed, preferably variablethrough the means of change-gears to regulate the pitch or lead of thebinder strand or strands as required. Tension means ar provided for theseveral strands from each head so that the strands may and preferably bewrapped tightly about the core and in most instances braking means areemployed to control the rotation of the spools or packages from wh chthe strands are delivered. Stopping mechanism may also be applied to themachine for arresting its operation should one or more strands becomebroken and also to stop the machine when the supplies run out.

Referring to the accompanying drawings, the present machine may bemounted on a stand having legs supported from the floor or, in othercases, it may be mounted on a bench or the like. As herein shown twohorizontal cross-members 2 are supported from the legs andrisingtherefrom are columnar standard 3 and 4 forming a skeleton framework. bemounted in socketed brackets 5, only one of which is herein shown,bolted to two cross-members 2. A pair of rods 5 and 1 held in brackets 8and 9 fastened to the columns 3 and 4 serve to brac the latter and alsofurnish a support for the upper head of the machine and its drivin'gmechanism to be described later. Mounted between the cross-members ofthe framework and supported therefrom is a main housing Ill containingthe gearing for driving the lower head, indicated generally by thereference character 15, while the upper head is designated 16.

Th 'main head I5 is mounted on a hollow spindle l1 journaled in spacedball-bearings in the housing 10, the housing serving as a reservoir foroil to lubricate the bearings and the gearing which drives the head. Thehousing I0 is formed at the bottom with a boss l9 counterbored toreceive the outer race for the lower ball-bearing and a cover 2! screwedonto the top of the housing is formed with a boss 22 counterbored toprovide a seat for the outer race 23 of the upper ball-bearing, thislatter race being held in place by a' collar 24 fastenedto the boss 22by a screw 25.

The hollow spindle I1 is formed with a shouldered seat 26 for the innerrace 21 of the upper ball-bearing and between the races are suitableballsj28 Beneath the upper bearing the spindle l'ljis' formed with ashouldered seat 29 for a heli When supplied with The standards 3 and 4may i1 is in mesh cal gear 30 held rotatively therewith by a key 3|. Asleeve 32 secured fast on the reduced portion of the spindle l1 holdsthe gear 30 against the shoulder of its seat 29 and its lower end isreduced in diameter to provid a seat for the inner race 33 of the lowerball-bearing with balls 23 between the races. A packing washer 34underlies the lower ball-bearing for preventing escape of th lubricantfrom the bottom of the housing ID. A flanged sleeve 35 is insertedthrough the reduced lower end of the bore in the boss 19 extending downthrough a depending neck 36 on the under side of the housing ID. Theperiphery of the sleeve 35 is screw-threaded to receive a nut 31 set upagainst the end of the neck 36 to secure the sleeve in place.

Below the nut 31 the sleeve 35 is reduced in diameter to receive ahollow member 38 fastened thereto by a set-screw 39. Th member 38 isflanged outwardly at its lower end in the manner of a trumpet to providea re-entrant opening for receiving the core or wire w in threading it upthrough the tubular spindle l1, whence it emerges at the top to beserved with the strand material. Within the lower end of the hollowspindle I1 is a quill-like tube 40 held fast in the sleeve 35 with itsperiphery spaced from the inner wall of the spindle to provide aclearance therebetween. The tube 40 is thus held against rotation andacts as a guide for the core or wire w to prevent it from being twistedor turned by frictional contact with the interior of the rotary spindle11.

Referring to Fig. 5, the gear 30 on the spindle with a helical gear faston a stub-shaft 46 journaled in a stationary bearing 41 supported fromthe bottom wall of the housing l0. At the opposite end of the stub-shaft46 is a spur-gear 48 meshing with a gear 49 fast on the end of a maindrive-shaft 50 to which power is applied for rotating the lower head 15.The shaft 50 is journaled in a bearing 5| held in a bore in the side ofthe housing l0 and extends outwardly through bearings in an overhangingbracket 52 bolted to the housing at 53, see Fig. l. The outer end of theshaft 50 carries a beltpulley 55 which may be connected to the shaft bymeans of a clutch, not herein shown or described in detail, throughwhich the drive of the machine may be controlled. The drive for theupper head I6 of the machine is taken from the main shaft 50 through anarrangement of sprockets, chains and gearing to be described later. 7

The main head 15 is constructed in the form of a circular disk having adepending hub 6| surrounding the hollow spindle I1 and keyed thereto at62. The supply packages P of yarn or other strand material are wound onpaper tubes or cores mounted on tubular mandrels 63 supported at theirends by pintles 65 journaled in ball-bearings as shown in Fig. 4. Thislatter plan View shows the upper head 16 and its driving connections andthe arrangement of the bearings for the packages is the same as on thelower head and therefore are described in connection with this view.Held in bores in the arms of each supporting bracket are hollow plugs 10and 1| enclosing ball-races 12 for cooperation with races 13 on thepintles 55 with balls between the races. The pintles 65 have reducedspindles 15 provided with flanges 16 and forwardly-projecting heads 11adapted for insertion into the ends of the hollow mandrels 63 on whichthe packages C are carried. The bearings for each end :of:':the mandrels63- are of similar construction except that one plug TI and its pintle65 are manually retractible in the supinto the opposite end of themandrel; a locking pin 80 carrying a finger-knob 8I being first re=leased from engagement with the plug. The locking pin 80 is slidableaxially through a bushing 82 in the end of the bracket arm andis-normally forced inwardly to engage its end with a slot 83 in thebearing plug H, by means of a helical spring 85 whereby to hold thepluglocked with the mandrel 63 in engagement with the. head 11;on thepintle. The spring 85 is coiled around a reduced portion of bearingagainst a shoulder thereon and its oppo site end held against the end ofthe bore in the bushing 82 in which the pin slides. Theknob 8| is pinnedto the reducedsstem of the locking pin80 to adapt it to bewithdrawnmanually to release its end from the slot 83 so that the plug 11. maybewithdrawn by its knob 18 and the head 11 of the pintley65 releasedfrom the end of themandrel 63. I H Referring againto Fig. 1, each of theeight packages P on the head I5 is mounted in the manner above explainedon rotary pintles journalled in ball-bearings in the bosses on theupright stanchions of the brackets 61. Each pair of brackets 61 isarranged to support two cops or packages P of strand material, see Figs.1 and 2, with their axes extending horizontally and staggered ininclined relationship, the whole forming a truncated pyramid to conservespace and provide for mounting a large number of packages on the headI5.. The pairs of brackets 61 are arranged in spaced relation platformor disk 60 of the head I5 to support eight separate packages so that thestrands therefrom will lead upwardly at an angle to the core. or wire 20as it emerges from the top of the hollow spindle I 1 around which thehead rotates.

The upper end of the spindle I1 is reduced in diameter to receive acylindrical hub 90, see Fig. 3, which carries four radial arms 9I spacedequidistantly therearound and serving as a mounting for an equal numberof angularly-positioned brackets 92. Referring particularly to Figs. 1and 3, the brackets 92 support a series of spaced guides for directingthe strands y from the lower head upwardly through tension-devices 93 toconverge at the end of the spindle I1-ancl feed to the wire w to bewrapped therearound. At the lower end of each bracket 92 is a porcelainguide 94, spaced thereabove'are aseco'nd guide 95 and third'guidellfiwith the tension-device 93 mountedbetween the last two mentioned guides.The tension-devices 93 may be of the usual disk-type as well known tothose versed in the art to adapt the strands y to draw between theopposed faces ofthe disks which are pressed together by means of weightsor springs, not herein shown in detail. Held in the upper end of thebore of the hub 90 is a cylindrical member 91 fastened in place by aset-screw 9t and formed with an upper beveled rim 99. The rim 99 isprovided with a plurality of radially-projecting guide-pins I I aroundwhich the strands lead to hold them separated until they merge in-;-thewrapped covering onthe core or the pin 80 with one end wire 10. Held inthe bore of the member .center to form guide-eyes H2 against the wire was it feeds therethrough.

As shown in Fig. 9, two wire bails I I0 and II I may be provided on thehead I5 projecting forwardly from eachbracket 61 and looped at thethrough which the strands y from the lower packages P lead to dimet themupwardly and prevent them from rubbingragain'stthe related packages inthe upper group."

The upper auxiliary head I6 is organized in substantially the samemanner as that of the lower head I5. A gear-casing or housing I ismounted on the pair of horizontal rods 6 and 1, previously mentioned,which extend through apertured lugs I 22 formed on its bottom, the rodsI25 and I26 at the top and bottomre spectively of the housing I20 areball-bearings I 21 for a tubular shaft I30 through which the core orwire w feeds upwardly. A quill-like tube I3I spaced from the interior ofthe shaft I30 is held in a flanged sleeve I32 fitted to the bore in thebottom of the housing I20 with a nut I33 screwed onto itslower end. Acup-shaped collar I-34 held on the reducedend of the sleeve I32 isprovided with an axial aperture through which the wire feeds. Fast onthe upper end of theshaft I30 is' a spider I35, see Fig. 4, forsupporting the cops or packages 0 of the upper head I6, not more thantwo ofthese being usually employed for the binder strands. The lower hubI36 of the spider I extends downwardly through an aperture in a plateI31 which overlies the upper ball-bearing I21 and closes the counterborein a cover or closure I38 fitted across the top of the housing I20.Above the spider I35 is a hub I39 surmounted by a nose-piece I40 fittedto its bore, see Fig. 8, and formed with a restricted bore terminatingin an orifice through which the wire w feedsafter it has been servedwith the strands fromthe lower head I5. Porcelain guides I4I are mountedon'the spider I35 with other guides I42 supported thereabove on the hubI39, these guides serving to direct the strands y from the cops orpackages C on the upper head I6 upwardly across the beveled end of thenose-piece I40.

It has been explained that the cops or packages C carried by the upperhead "I6 are mounted on rotary 'arbors or mandrels 63 supported onpintles 65 journaled in ball-bearings and shown in Fig. 4% held in thearms I 43 and I 44 of the spider I35. The upper head'l 6'is driven inthe opposite direction from that of the lower head I 5 by means ofhelical gearing shown in the plan View, Fig. l. A horizontal drive-shaftI45 is journaled in spaced bushings I 46 held in a bearing I48 formedintegral with the gear-housing I20. A gear I50 on the inner end of theshaft I45 meshes with a gear I5I, see also Fig. l, which is secured faston the hollow shaft I30 by a key I52. A collar I53 holds the gear I50 inplace on the end of the shaft I45 and a second collar I55 abuts theouter end of the bearing I 98 to hold the shaft from axial movement inits bearing. I

Referring to Figs- 1 and 6, a bifurcated bracket I56 secured fast on"thestandardor column 4 by means of set-screws I51 projects outwardlytherefrom to provide bearings for a gear-train shown in Fig. 6. Thedrive-shaft I65 for the upper head I6 is journaled at its outer end in abearing I58 fastened to a seat on the bracket I56 by bolts I59. Keyed tothe outer end of the shaft I45 abutting the end of the bearing I53 is aspur-gear I60 held in place by a collar I6I fastened by a set-screw I62.Below the gear I60 is a similar gear I63 mounted on the end of astub-shaft I64 which is journaled in a bearing on the bracket I56 withcollars I66 and I51, shown in Fig. l, holding these parts in place. Inmesh with the two gears I66 and I63 is a change-gear I16 mounted on aheaded bolt I1I which is adjustable in a slot I12 formed in a swingingarm I13. The bolt I1I is fastened in adjustable position along the slotI12 by means of a nut I14 which can be released to change the positionof the bolt for accommodating change-gears of varying diameters. As afurther means for adjusting the position of the bolt HI and gear I13 thearm I13 is pivotally mounted on the stub-shaft I64 to swing toward oraway from the driving gear I66, a curved extension I of the arm I13being formed with a slot I16 through which extends a stud I11 projectingfrom the bracket I56 with a nut I18 on its end for clamping the arm I13in adjusted position. The stub-shaft I64 carries a sprocket-wheel I80fast thereon, see Fig. l, the teeth of which engage with a chain IBIdriven from the main driveshaft 50.

Referring to Fig. 7 the main drive-shaft 50 carries a sprocket I82 onits outer end connected by a chain I83 to a larger sprocket I84 fast ona stub-shaft I35. The shaft I85 is journaled in a bearing I66 supportedat the rear of the main frame of the machine by the cross-member 2extending between the legs I88. The shaft I65 also carries a smallersprocket I90 with which the chain I8I engages to drive the uppersprocket I86 and gear-train, shown in Fig. 6, and thereby the shaft Iwhich transmits rotation to the upper head I6. It has been explainedthat power the main drive-shaft by means is applied to of the pulleybelted to a line-shaft or motor and through these last-describedconnections the two heads are rotated in opposite directions; the mainhead I5 being usually turned clockwise and the auxiliary head I6counterclockwise, although the direction of each may be reversed bychanging the arrangement of the gearing.

The core or wire w is drawn upwardly from the supply wound on a reelarranged below, fed through the hollow spindle I1 and as it emerges fromthe nose it is served with the strands y from the packages P on the mainhead I5. Thence the wire w passes through the upper head I6 and tubularshaft I30 to emerge from the nosepiece 645 where the first serving isbound in place by the strands y from the upper supply packages C. Agrooved wheel or capstan IilI, shown fragmentarily in Fig. 1, receivesthe covered wire R which is coiled several times about its periphery anddelivers it therefrom down to another take-up reel located at the sideor rear of the machine. The capstan I9I is driven by a vertical shaftI92, see Fig. 1, suitably geared thereto and to the main drive-shaft 56,these connections not being herein shown. Suffice it to state that thearrangement of the last-mentioned wire feeding and delivering mechanismsof the machine is similar in most respects to that shown and describedin United States Letters Patent No. 1,064,407, dated June 10, 1913,

for Braiding Machine and therefore not described herein. Stoppingmechanism for the heads of. the machine may be employed, for example, ofa form generally similar to that shown in United States Letters PatentNo. 1,085,369, dated January 27, 1914, to be actuated by suitabledrop-wires normally held suspended by the running strands.

In order to prevent the cops or packages of yarn from overrunning underthe rapid draft of the strands therefrom it is preferable to employbraking means, for example, such as shown in Figs. 8 and 9. Asillustrated in Fig. 8, flexible thin sheet-metal plates I held bycollars I96, fast on studs I91 which support the threadguides on theupper head I6, are arranged to bear yieldingly against the peripheriesof the upper cops or packages C during the unwinding of the strandstherefrom. For the packages P carried by the lower or main head I5 thereare provided pivoted brake-arms 266 and 251. The shorter arms 236 arepivotally mounted in bearings 262 on a plate 206 on the lower head I5and formed at their upper ends with enlargements 253 having convexforward faces which bear against the peripheries of the packages P. Thelonger arms 2M are pivoted at their lower ends in bearings 264, alsomounted on the plates 206, and formed with enlargements 265 at theirupper ends with convex faces for contact with the peripheries of thepackages P in the upper group or tier. These brake-arms are provided forthe eight packages carried on the main head I5 and are caused to swingoutwardly about their pivots under centrifugal force acting on theirweighted upper ends as the head is rotated at a rapid rate, therebycausing the enlargements on the arms to press against the surface of thewinding on the several packages to resist the rotation of the latter andcontrol the unwinding of the strand material therefrom. Usually, thestrands y are wound in multiple on the packages P and in. otherinstances spools of fine wire may be used to supply the wrappedcovering. The construction and arrangement of the parts of the presentimproved serving machine having been described in detail its method ofoperation is explained briefly as follows:

The wire w or other core wound on a supply reel, not shown, is drawn offtherefrom and threaded up through the hollow spindle I1 carrying thelower head I5, continued upwardly through the nose-piece at its end,threaded through the upper hollow spindle I36 to emerge from the uppernose-piece I46 and a few turns taken around the capstan ISI. Thence thewire is delivered to a take-up reel as the machine starts to operate andthe capstan feeds the wire through the machine. The shaft 56 driven bythe pulley 55 drives through the gearing in the housing I0 to rotate thehollow spindle I1 and the head 55 carried thereby. Meanwhile the strandsy are drawn off from the supply packages P and fastened to the wire w bygiving them a few turns therearound or otherwise attaching them as withadhesive tape. As the machine operates with the main head I5 turning inone direction to revolve the supplies P around the wire 10 or other corethe strands y will be wrapped tightly therearound as tension is appliedthereto by the tension-devices 93 previously described. The wire w feedsup through the hollow spindle I30 of the upper head I6 which is rotatedin the opposite direction from that of the main head I5 whereby thestrands y from the upper packor wire w being served. The Wire or othercore may thus be served continuously in long lengths taken from a largesupply reel and when it is required to replenish the supplies of strandmaterial it is unnecessary to cut the wire. That is to say, theoperation of the machine stopped and without cutting the wirefreshpackages, or in some cases spools, carrying the new supply of strandmaterial are placed on the heads by removing the mandrels 63 on whichthe first supplies are supported and replacing them in the bearingsafter thefreshsupplies have been ap plied thereto. It is a. simplematter to remove and replace the mandrels63 by withdrawing thelock-pins. 80 to permitthe plugs tobe re tracted for releasingthepintles from the ends of the mandrels. Then when the fresh packageshave been placed engage in theirslots a so that the arbors or mandrels63 will be securely held without chance of escape from their bearings tofly out from the heads during the rapid rotation of the latter. Afterthe heads have been furnished with fresh supplies of strand material themachine may be started again to continue serving the covering on thecore or conductor for the full length thereof. This is a most importantresult of the present improved construction of the machine in that forinsulating electrical conductors it is undesirable to cut the wire inrelatively short lengths as it then becomes necessary to splice the endstogether and repair the insulation at the splices. Usually, electricalconductors served with yarn, glass-fiber or similar strand materialrequire another covering of rubber, plastic, or in some cases, a braidedjacket which may be treated to render it weather-proof.

It will be observed from the foregoing specification that the presentinvention provides an improved sewing machine adapted for covering coressuch as electrical conductors with closelywrapped strands of variouskinds of material, with binder strands laid over the first wrap ifwithout necessitat ng cutting the lengths and splicing the endstogether. While the invention is herein shown as embodied in a preferredform of construction, it is to be understood that modifications may bemade in the structure and arrangement of the parts of the machinewithout departing from the spirit or scope of the invention as expressedin the accompanying claims. Therefore, without limiting ourselves inthis respect, we claim:

1. In a serving machine, a hollow spindle, spaced bearings forsupporting said spindle to rotate about a vertical axis, a main headmounted on said spindle to rotate therewith, means for supporting aplurality of strand-packages on said head with their axes extendinghorizontally spindle to be wrapped around a core feeding spindle, asecond spindle arranged in alinement through the packages on said maincarried by the auxiliary head with their axes extending horizontally, Ameans tonguide the strands from the supplieslontheiauxiliary head toconverge at the end of the second spindle and be driving the first-namedspindle to rotate the main head, change-gearing for driving the secondspindle to rotate the auxiliary head, and for the two heads in oppositevariable ratio of speed.

2. In a serving machine, a gear-housing, a hollow spindle journaled inbearings in said second housing for rotation about a vertical axis, anauxiliary head carried by, the second spindle, means 'for supporting aplurality of strand su'phead with their axes dismeans for feeding a coreaxially through both spindles, means for guiding the strands from thesupplies on the auxiliary head to cause them to converge beyond the endof its spindle and be wrapped around the firstserved strands to bindthem in place, gearing in the housings for rotating the heads, and.means for driving the gearing in both housings from a source of power.

3. In a serving machine, a hollow spindle, means for feeding a coreaxially through said hollow spindle, bearings for journaling saidspindle to rotate about a vertical axis, a main head mounted on saidspindle to rotate therewith, means for supporting a plurality ofstrandhead, means to guide the strands from said strand-packages toconverge at the upper end of the spindle, a drive-shaft, gearingconnecting said drive-shaft to rotate the spindle and drive the mainhead, a second hollow spindle arranged above and in spaced relation tothe first spindle, bearings for journaling the second spindle to rotateabout a vertical axis in line with the axis of the first-named spindle,an auxiliary head mounted on said second spindle, a plurality ofstrand-packages carried by the auxiliary head, means to guide thestrands from the strandpackages on the auxiliary head to converge at theend of the second spindle for wrapping them around the first-servedstrands on the core feeding through said second spindle to bind saidfirst-served strands in place, gearing for driving the second spindle,and means to connect said gearing with the drive-shaft to rotate theauxiliary head in the opposite direction from that of the main head.

4. In a serving machine, a hollow spindle, bearings for supporting saidspindle to rotate about a vertical axis, a main head mounted on saidspindle to rotate therewith, a horizontal drive-shaft, gearingconnecting said drive-shaft to rotate the spindle, means for supportinga plurality of strand-packages on said for guiding the strands from saidpackages to converge beyond the end of the spindle for wrapping themaround a core feeding through the 11 hollow spindle, a plurality oftension-devices for tensioning the strands leading from the severalpackages to .the core beyond the upper end of the spindle, a'secondspindle arranged above and in spaced relation to the first spindle, formounting the second spindle to rotate about a vertical axis, anauxiliary head mounted on the second spindle for rotation therewith, aplurality of strand-packages carried by said auxil' iary head, guidingmeans for leading the strands from the packages on the auxiliary head toconverge at the upper end of the second spindle for wrapping them aroundthe first-served strands on the core, change-gearing for driving thesecond spindle to rotate the auxiliary head, and means for connectingthe drive-shaft to said change-gearing for the auxiliary head to rotatethe auxiliary head in the opposite direction from that of the main headwith a variable speedratio therebetween.

LOUIS SHULVER. KENNETH H. ARNOLD.

References Cited. in the file of this patent Number Number 12 Name DateFrederick Feb. 18, 1902 Tobey Nov. 11, 1913 Chamberlain Jan. 27 1920Bradt Mar. 28, 1922 I-Ioovens July 8, 1924 Koella Dec. 2, 1924Frederickson Apr. 9, 1929 Morin Aug. 5, 1930 McKnight Mar. 31, 1931 VanHook Dec. 15, 1931 Zettek June 21, 1932 Frank Nov. 15, 1932 Angell et alNov. 7, 1933 Petterson June 11, 1935 Johnson et a1 Mar. 22, 1938 Ford eta1 Nov. 19, 1940 Robinson et al. Apr. 28, 1942 Reardon et al May 25,1943 FOREIGN PATENTS Country Date France Dec. 1, 1874

